It is possible that some projects are unable to list tokens on exchanges because the listing costs are too high. Currently the listing costs of many exchanges have been reduced and quite low, so if the token is not listed anywhere, the cause could be that the token has no community or the project has failed.
You should consult the development status of that project to be able to decide the fate of those tokens.
What can you do with them?
I think you can hold a game with crypto reward. I think no one wants to deny assets that have a chance of going up in price in the future (even if only 1%)
